Challenger MT645B - Horsepower, Weight, Specs, Problems, Price & More

The Challenger MT645B tractor is powered by a Sisu 7.4L 6-cyl diesel engine that provides of horsepower and torque. It has a drive configuration and a continuously variable transmission (CVT) transmission.

• Engine
• Transmission
• Brakes
• Steering
• Common Problems
• What Users Like
• Technical Specifications

Engine

The engine is a Sisu 74ETA turbocharged diesel 6-cylinder 24-valve liquid-cooled vertical inline with a displacement of 449ci / 7.4L and bore/stroke of 4.251x5.278inches / 108x 134 mm. It has a power output of 235hp / 175.2kW and a compression ratio of 17.5:1. The engine is equipped with dual paper elements air cleaner and a 1000W coolant heater (optional). The rated rpm is 2200 and the starter voltage is 12. The oil capacity is 20qts / 18.9L and the coolant capacity is 35.6qts / 33.7L.

Transmission

The transmission is a continuously variable transmission (CVT) which provides an infinite number of gear ratios. This allows for smooth and efficient power transfer to the wheels. The CVT also allows for precise speed control and reduces fuel consumption. The transmission is designed to handle the high power output of the engine and provide reliable performance in all conditions. It is easy to operate and provides smooth shifting.

Brakes

The brakes are hydraulic wet disc brakes which provide reliable stopping power. They are designed to handle the high power output of the engine and provide consistent performance in all conditions. The brakes are easy to operate and provide smooth and responsive stopping power. The hydraulic system is designed to provide reliable performance and is easy to maintain.

Steering

The steering is powered by a Sisu 7.4L 6-cylinder diesel engine. It provides precise and responsive steering control and is designed to handle the high power output of the engine. The steering system is easy to operate and provides smooth and responsive steering control. It is designed to provide reliable performance in all conditions.

Common Problems

Users have reported issues with the cab suspension and automatic climate control. Some users have also reported issues with the hydraulic system. However, these issues are rare and can be easily resolved with proper maintenance and repair. Overall, the Challenger MT645B is a reliable and durable tractor that provides excellent performance in all conditions.

What Users Like

Users appreciate the large front and rear tires (380/85R34 and 480/80R46) which provide excellent traction and stability. They also appreciate the four-wheel drive, power steering, and hydraulic wet disc brakes which provide reliable performance in all conditions. The cab is standard with heat and A/C, and users appreciate the optional pneumatic cab suspension and automatic climate control which provide a comfortable and ergonomic working environment.

Challenger MT645B Technical Specifications

Engine Detail
Description	Sisu 74ETA turbocharged diesel 6-cylinder 24-valve liquid-cooled vertical inline
Displacemen	449ci / 7.4L
Bore/strok	4.251x5.278inches / 108x 134 mm
Powe	235hp / 175.2kW
Air Cleane	dual paper elements
Pre-heatin	1000W coolant heater OptOptional
Compressio	17.5:1
Rated Rp	2200
Starter Volt	12
Oil Capacit	20qts / 18.9L
Coolant Capacit	35.6qts / 33.7L
Engine
Description	Sisu 7.4L 6-cyl diesel
Transmission
Description	continuously variable transmission (CVT)
Mechanical
Description	Four-wheel drive Power steering Hydraulic wet disc brakes Cab standard with heat and A/C. Optional pneumatic cab suspension and automatic climate control.
Final Drive	inboard planetary
Differential Loc	electrohydraulic front and rear
Trailer Brake	hydraulic OptOptional
Tires
Ag Fron	380/85R34
Ag Rea	480/80R46
Dimensions And Tires
Wheelbas	121.1inches / 307cm
Weigh	18308 to 19595 pounds
Front Tir	380/85R34
Rear Tir	480/80R46
Capacity
Fue	159gal / 601.8L
Hydraulic Syste	26.4gal / 99.9L
Hydraulics
Typ	pressure flow compensated (PFC)
Capacit	26.4gal / 99.9L
Pressur	2900psi / 200.0bar
Valve	4 to 6
Total Flo	39gpm / 147.6lpm
Tractor Hitch
Rear Typ	III
Rear Lift (at 24	15,600lbs / 7076kg
Front Hitc	II OptOptional
Front Lif	7,700lbs / 3492kg/12,100lbsOptOptional / 5488kg
Electrical
Groun	negative
Charging Syste	alternator
Charging Amp	150
Batterie	2
Battery Cc	775
Battery Volt	12
Power Take Off Pto
Rear Pt	independent
Clutc	electro-hydraulic wet disc
Rear Rp	540 (1.375)/540/540E OptOptional/1000 (1.375)/1000 (1.75)
Engine Rp	540@2037 / 540E@ 1598 / 1000@2031

Other Challenger tractors:

Challenger 1042, Challenger 1046, Challenger 1050, Challenger 35, Challenger 45, Challenger 55, Challenger 70C, Challenger 75D, Challenger 75E, Challenger 85C, Challenger 85D, Challenger 95E, Challenger MT297B, Challenger MT455D, Challenger MT455E, Challenger MT465D, Challenger MT465E, Challenger MT475D, Challenger MT475E, Challenger MT485D, Challenger MT485E, Challenger MT495D, Challenger MT495E, Challenger MT515D, Challenger MT515E, Challenger MT525B, Challenger MT525D, Challenger MT525E, Challenger MT535B, Challenger MT535D, Challenger MT535E, Challenger MT545B, Challenger MT545D, Challenger MT545E, Challenger MT555B, Challenger MT555D, Challenger MT555E, Challenger MT565B, Challenger MT565D, Challenger MT565E, Challenger MT575B, Challenger MT575D, Challenger MT575E, Challenger MT585B, Challenger MT585D, Challenger MT585E, Challenger MT595B, Challenger MT595D, Challenger MT595E, Challenger MT635B, Challenger MT645B, Challenger MT645C, Challenger MT645D, Challenger MT645E, Challenger MT655B, Challenger MT655C, Challenger MT655D, Challenger MT655E, Challenger MT665B, Challenger MT665C, Challenger MT665D, Challenger MT665E, Challenger MT675C, Challenger MT675D, Challenger MT675E, Challenger MT685D, Challenger MT685E, Challenger MT735, Challenger MT738, Challenger MT740, Challenger MT743, Challenger MT745, Challenger MT745B, Challenger MT755, Challenger MT755B, Challenger MT755D, Challenger MT755E, Challenger MT765, Challenger MT765B, Challenger MT765D, Challenger MT765E, Challenger MT775E, Challenger MT835, Challenger MT835B, Challenger MT835C, Challenger MT845, Challenger MT845B, Challenger MT845C, Challenger MT845E, Challenger MT851, Challenger MT855, Challenger MT855B, Challenger MT855C, Challenger MT855E, Challenger MT856, Challenger MT862, Challenger MT865, Challenger MT865B, Challenger MT865C, Challenger MT865E, Challenger MT867, Challenger MT875B, Challenger MT875C, Challenger MT875E, Challenger MT945B, Challenger MT945C, Challenger MT955B, Challenger MT955C, Challenger MT955E, Challenger MT965B, Challenger MT965C, Challenger MT965E, Challenger MT975B, Challenger MT975C, Challenger MT975E,